Antibackfiring gas mixer



June 13, 1933. s. BASSEAU, NEI-E 'GUICHARD 1,913,737

ANTIBACKFIRING GAS MIXER Filed Dec. 2, 1950 2 Sheets-Sheet 1 Fig.1.

/NVENTOR 1 June 13, 1933. s. BASSEAU, NEE GUICHARD 1,913,787

ANTIBAGKFIRING GAS MIXER Filed Dec. 2, 1930 2 Sheets-Sheet 2 i; Z? i;

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Patented June 13, 1933 Un ts. STATE 7 Fries a;

Suzanna BASSEAU, ma GUIGHARD, or PARIS, Fixation "nnrinacxrrnme ens v'rrxnn Application filed December 2, 1930, Serial No.

be placed in any con- These devices may the venientpoint of the'path followed by car'buretted mixture.

The device shown in Figure 1 consists substantially in a nozzle 1 inserted in the path of gas supply to the motor and contains a gently friction mounted helical screw 2 the axis 3 of which'may freely rotate between two points 4 and 5, fixed for instance on cross pieces 6 and 7 adapted on the ends of the nozzle 1.

On the end, of screw 2, facing the carburetor, a spray-device is fixed (8), consisting, as an instance, of a fine wire-gauze disc.

It is easily seen that in consequence of the suction of the engine the gas stream, when getting in contact with the rotating surface 8, will 'be finely atomized and vigorously stirred up before beginning to flow into the helical space included betweenthe screw 2 and the inside face of the nozzle 1.

The explosive mixture thus finely atomized, follows in its way up this helical space causing the movable system formed by screw 2 and strainer to start rotating, being itself thus still more stirred up permanently by said screw.

Rotation takes place always in the same direction on account of the thread of the screw; it is then clear that in case of firing back into the engine and in order that the carburetor might be reached and set on fire, it would be necessary for the screw to be braked and completely maintained fixed, and be then forced to rotate in an opposite ,d1recti0n to that produced by suction.

499,581, and in France December 7, 1929.

No back flow, however violent, "would be capable of opposingt'he runnlng direction, as the workmg cylinders are maintaining a suction suffici ent enough toensure the rotation of the screw andresist eificaciously any 55.

pressure in shouldthe ba the opposite direction. {Even ck flow sufliceto modify the direction of rotation of, the-device, when the flame gets in-contactwith the strainer 8 .previously mentioned, the latter,-=also forced to rotate as explained. above, will ensure stopping the flame; besides, at that time, the

flame would becooled and itslpropagation' velocity would practically-- be reduced I to Inthe modification shown in Figure 2,

the same movabledevice is met with. as well as the sameatom zer-d1sc 8, but, in the present case, the helical screw is replaced by one or more'wing'lets or, screws 2 suitably incl1ned,havmg the same function as the mentioned helical screw 2.

It will of course be possible, for. some cases, to combine several movable atomizers with the device 2- formerly mentioned; 5 thesegatomizers could then, for instance, be placed on b-othsides ofsaid device.-

Preferably, the axis Sofscrew. be hollow and carry inits inside, as shown on'Figure 8, its ends against, an abutment-.10;

2 should by one of a sprmg- 9 bearing(F 5) lg-ure and by its other end against a sliding abutment 11 (Figure 4) 7 this slit being crossed ,bya pm: 13, these provided with a slit :12,

abutments applying against theabove mentioned: pins 4 t is clearand-5. that the spring 8, on pushing the movable abutment ll, will automatically take up the play caused by wear.

It is also to be understood that jsuch device for takingup'the play maybe realized in' any other way,

the embodiment represented herein showing-nolimiting feature.

Itwill be noted that ,the' suction nozzle 5 may also carry, at its end facing. themotor,

a stationary or rotating device adapted to atomize the petrol droplets that may come out of the de yice. i

;It :must also be noted that the helical screw 7 or dev ice 2; mightalsobe placed in h any other convenient point of the driving axis 3; this axis may also be mounted on ball bearings or in any other suitable manner, instead of between points.

It is also to be understood that screw 2 may be a simple or multiple one and that its threadas well as its dimensions may vary as desired.

It is clear that the strainer 2 may be replaced by any other spraying device, for like operation.

It is obvious that the apparatus, object of the present invention, may be constructed in one piece with the induction pipeof the engine.

Any other modifications that might be effected are intended to be within the purview of the invention.

I claim:

1. A device adapted to be positioned in the upright part of a conduit leading from a carburetor to the cylinders of an internal combustion engine, comprising a cylindrical tubular casing provided with axial bushings at the upper and lower ends thereof, adjustable bearing screws enthreaded in said bushings, means for locking said screws in adjusted positions, a cylindrical tubular member arranged axially in said.

casing, cylindrical bearing elements posi tioned in the upper and lower ends of the tubular member, each of said bearing elements being provided with an axial recess adapted to receive the bearing portion of said adjustable screws, each of said cylindrical bearing elements having an aperture extending diametrically therethrough, means extending through openings in the walls of the tubular member and the apertures in the bearing elementsfor securing the bearing elements to the tubular member, one of said apertures being axially elongated to provide for sliding of the bearing element axially o-f-the tubular member, a coil spring positioned in said tubular member between the bearing elements for resiliently maintaining the bearing elements in engagement with the adjustable screws, and an Archimedean screw carried by the tubular member and adapted to completely fill the interior of the tubular casing so that all gases passing therethrough will have to travel through the helical passage between the threads of said screw.

2. A device adapted to be positioned in the upright part of a conduit leading from a carburetor to the cylinders of an internal combustion engine, comprising a cylindrical tubular casing provided with axial bushings at the upper and lower ends thereof, adj ustable bearing screws enthreaded in said bushings, means for locking said screws in ad justed positions, a cylindrical tubular member arranged axially in said casing, cylindrical bearing elements positioned in the upper and lower ends of the tubular member, each of said bearing elements being provided With an axial recess adapted to receive the bearing portion of said adjustable screws, each of said cylindrical bearing elements having an aperture extending diametrically therethrough, means extending through openings in the walls of the tubular member and the apertures in the bearing elements for securing the bearing elements to the tubular member, one of said apertures being axially elongated to provide for sliding of the bearing element axially of the tubular member, a coil spring positioned in said tubular member between the bearing elements for resiliently maintaining the bearing elements in engagement with the adjustable screws, an Archimedean screw carried bythe tubular member and adapted to completely fill the interior of the tubular casing so that all gases passing therethrough will have to travel through the helical passage between the threads of said screwpand a disc of metallic gauze mounted on the rotatable tubular element and interposed in the path of the gases passing through the tubular casing.

In testimony whereof I affix my s1gnature.

SUZANNE BASSEAU, ne GUICHARD. 

